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You are seeing a 15yo patient with past psychiatric history who takes escitalopram (Lexapro) and quetiapine (Seroquel) for nausea and vomiting. You give the patient a dose of ondansetron (Zofran) and an IV fluid bolus, then discharge him home with a prescription for ondansetron. His parent gives him diphenhydramine (Benadryl) before bed to help him fall asleep. He becomes upset and overdoses on one of the medications in the home.